Review_Biol1308 Unit IV Exam_spring 2017.docx

A series of flattened membranes looking a little like

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- A series of flattened membranes looking a little like a cut onion - Acts as “receiving and shipping department” for the cell - Receives newly made proteins - Processes new proteins and adds “zip codes” to direct proteins to correct organelle 7. Describe the structure and function of vesicles. Include the following: transport vesicle and lysosome . - Membrane bound sacs that often carry proteins - these vesicles wither fuse with the plasma membrane to deliver proteins to the rest of the body or get shipped to other organelles - Lysosomes are also vesicles filled with digestive enzymes - protists engulf food in vacuole—lysosome fuses with food vacuole, and digested food and releases nutrients into cell - white blood cells engulf invading bacteria—lysosome digests these bacteria 8. Sketch a mitochondria and label outer membrane , cristae, matrix, DNA, and ribosomes. 9. Give the 4 major functions of the cytoskeleton as listed in Module 5.3. - Maintain shape of the cell with structural support - Allow movement in the cell - “Roadways” to transport vesicles and organelles around the cell - anchor and stabilize nucleus and other organelles so nucleus remains in the middle of the cell 10. Compare the structure and functions of cilia and flagella - Both are extensions of the plasma membrane Cilia - are hair like projections that bend in unison, like rowing - specialized tissues in many multi-celled animals stay stationary and use cilia to beat to move liquids - ex: cells lining our windpipe that beat debris-filled mucus away from our lungs Flagella - are long whip-like projections from cells usually used for movement - bacteria, many protists, and sperm all have flagella Objectives for Module 6.1 Chemical Reactions 1. In the following chemical reaction, label the reactant(s) and product(s) 2 H 2 + O 2 2 H 2 O 2. Draw the arrow for this reversible reaction. CO 2 + H 2 O H 2 CO 3
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3. Identify the following reactions as a) Combination reaction, b) Decomposition reaction or c) replacement reaction A + B AB combination reaction DF + GH DG + FH recombination reaction RS R + S decomposition reaction 4. Write the steps for balancing an equation. 1. write down the number of atoms each element of the reactants and products 2. look at the number of atoms of an element on each side and determine what you need to change in order to make it balanced 3. look at the second side of the element and balance on both sides of the equation while making sure that you keep the first element balanced 4. continue with the third element until the equation is balanced 5. Define the terms Catalyst - The molecule that speeds up the reaction - Not used up by the reaction Enzyme - Made of protein, sometimes RNA -
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